NFL Flag Football Fall Season Sign-ups Avon Grove NFL Flag Football has begun on-line registration for players ages 5 through 16. You must register on our web site: www.agflag.com. Mail-in or walk-in registrations are no longer accepted. Fall registration will run through August 15, 2015. Late registrations are not accepted. Proof of age is required for new players. Age requirements are determined by the player’s age on September 1, 2015. Games will be played on Sunday afternoons in Landenberg early September and will run through early November. Cost is $85 per player. For more information, email Jim Russell at [email protected] or visit our web site: www.agflag.com.